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Do take into considerations adverse environmental
conditions such as strong winds, typhoons or
earthquakes as an improper installation may cause
the unit to overturn.
Take precautions to make sure the water will not
damage the installation space and environment in
the event of a water leakage.
If the unit is installed in a small room, refer to
section 4.2.3 "Safety measures to prevent
refrigerant leak" to make sure the refrigerant
concentration does not exceed the permissible
safety limit when there is a refrigerant leak.
Make sure the air inlet of the unit is not directed at
the main wind direction. Incoming wind will disrupt
the operations of the unit. If necessary, use a
deflector as an air baffle.
Add water discharge piping on the base so that the
condensed water will not damage the unit, and
prevent the accumulation of water to form pits when
the works are in progress.
4.2.2 Site requirements for installation of
outdoor unit in cold regions
NOTE
Snow protection facilities must be installed in
areas with snowfall. Refer to the following
figure, (malfunctions are more common when
there is insufficient snow protection facilities).
In order to protect the unit from accumulated
snow, increase the height of the rack, and
install a snow shield at the air inlets and
outlets.
Do not obstruct the air flow of the unit when
you install the snow shield.
Make note of the following when installing the unit in
areas affected by cold weather or snow:
Avoid direct wind blowing to the air outlet or air inlet
Wind
Building
Outdoor Unit
Air Flow
√ Correct
Wind
Building
Air Flow
Outdoor Unit
× Incorrect
Top view
Air Flow
Outdoor Unit
Outdoor Unit
Fig.4.1
16
The local maximum snowfall shall be considered
when deciding the foundation height of ODU. The
foundation or base height of ODU is required to
be the expected maximum snowfall thickness h0+
200mm, preventing the snow from exceeding the
bottom of the unit.
Snow shield
for air inlet
Snow shield
for air outlet
Snow shield
for air inlet
In severe cold areas, longitudinal foundation base shall
be used to ensure that drainage is not obstructed. The
height of foundation is recommended to be ≥ 500 mm.
√ Correct
Avoid horizontal installation foundation to prevent the
accumulation of ice and snow from hindering the
drainage of the chassis.
Ice
× Incorrect
h0
Fig.4.2
Snow shield
for air outlet
h0
Fig.4.3
Smooth
drainage
Fig.4.4
Fig.4.5
V.1
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